CVE-2026-65901

DOMPurify 3.4.6 Cross-Site Scripting via IN_PLACE nodeName

DOMPurify through 3.4.6 contains a cross-site scripting vulnerability in IN_PLACE mode that trusts attacker-controlled nodeName on live non-form nodes. Attackers can supply hostile live DOM objects with real script children whose observable nodeName is clobbered to appear as allowed elements, causing scripts to execute when the sanitized tree is inserted into a live document.

Affected

cure53 · DOMPurify

CVSS v4.0 VULNCHECK

5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.29% chance of exploitation in the next 30 days, 20th percentile

Published

2026-07-23

Proof-of-concept exploits (1)

• advisories/GHSA-x4vx-rjvf-j5p4

Security advisories

• cure53/DOMPurify/security/advisories/GHSA-x4vx-rjvf-j5p4
• https://www.vulncheck.com/advisories/dompurify-cross-site-scripting-via-in-place-nodename

References

• CVE Record
• NVD entry